3M CO — Director's Dealing 2005

Dec 10, 2005

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2005-12-06

Reporting Person: BUCKLEY GEORGE W (Director, CHAIRMAN OF THE BOARD & CEO)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	207808	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Non-Qualified Stock Option (right to buy)	$78.15	2015-12-06	Common Stock (250000)		Direct

Footnotes

F1: As part of the reporting person's compensation, the reporting person was
granted two restricted stock unit awards of 50,000 and 157,808 units. The
units vest over time assuming the reporting person remains employed by the
Company. Vesting is accelerated upon the termination of employment under
certain circumstances. Prior to vesting, cash payments in lieu of
dividends will be paid with respect to the 157,808 unit award, while
additional restricted stock units will be granted in lieu of dividends with
respect to the 50,000 unit award.

F2: As part of the reporting person's compensation, the reporting person was
granted 250,000 nonqualified options which vest in 20% annual increments
commencing 12/6/06 assuming continued employment. Vesting is accelerated
upon the termination of employment under certain circumstances.